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Fault detection method and fault detection device

A fault detection and fault technology, applied in the field of fault detection methods and fault detection devices, can solve the problems of limited professional and technical personnel, unable to meet the needs of on-load tap changer fault detection, etc., and achieve the effect of reducing dependence

Pending Publication Date: 2022-02-25
STATE GRID JIBEI ELECTRIC POWER COMPANY LIMITED CHENGDE POWER SUPPLY +1
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Problems solved by technology

[0003] The so-called DC test is to input DC power to the three input terminals of the off-load tap-changer respectively, and switch from the first test gear to the second switching gear, and finally record the DC waveform diagram and related data; usually Under the current situation, professional technicians analyze the cause of the fault of the on-load tap-changer based on the DC waveform diagram, relevant data and experience. However, the professional technicians are limited and cannot cope with the growing demand for fault detection of the on-load tap-changer

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  • Fault detection method and fault detection device

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[0060] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0061] In this application, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. an actual relationship or order. Moreover, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements inc...

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Abstract

The invention provides a fault detection method and a fault detection device. The fault detection method comprises the following steps: carrying out a direct current test on a to-be-detected on-load tap-changer, and obtaining test data of the to-be-detected on-load tap-changer and basic parameters of the direct current test; then taking the basic parameters of the to-be-detected on-load tap-changer as a screening basis, obtaining historical test data of the on-load tap-changer; and finally, carrying out fault detection on the to-be-detected on-load tap-changer by comparing test data of the direct current test with historical test data of the on-load tap-changer, that is, when a test result of the on-load tap-changer and basic parameters of the direct current test are the same as those of the to-be-detected on-load tap-changer, the fault detection result of the to-be-detected on-load tap-changer is the same as that of the on-load tap-changer, so that after the fault detection device adopts the fault detection method, fault detection on the to-be-detected on-load tap-changer can be automatically realized, and the fault detection method can reduce the dependence of fault detection of the on-load tap-changer on professional technicians.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a fault detection method and a fault detection device. Background technique [0002] In the transformer, the output voltage of the transformer can meet the user's needs by adjusting the turns ratio of the primary and secondary windings of the transformer through the on-load tap-changer, so for the transformer, the on-load tap-changer is very important. The transformer is the key power equipment in the power system, so the on-load tap changer also occupies an important position in the power system. At present, the faults of the on-load tap-changer account for 90% of the total tap-changing faults, so the DC test of the on-load tap-changer is of great significance to ensure the safe operation of the power system. [0003] The so-called DC test is to input DC power to the three input terminals of the off-load tap-changer respectively, and switch from the first test gear to...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/3272
Inventor 白明辉苗宏佳席海阔张婉明白雪松刘洋孟继军张新亮李莉杜鹏超丁家超乔佳子
Owner STATE GRID JIBEI ELECTRIC POWER COMPANY LIMITED CHENGDE POWER SUPPLY
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